1 /* symbols.c -symbol table-
3 Copyright (C) 1987, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to
19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
27 #include "obstack.h" /* For "symbols.h" */
30 #ifndef WORKING_DOT_WORD
31 extern int new_broken_words
;
34 /* symbol-name => struct symbol pointer */
35 static struct hash_control
*sy_hash
;
37 /* Below are commented in "symbols.h". */
38 symbolS
*symbol_rootP
;
39 symbolS
*symbol_lastP
;
42 symbolS
*dot_text_symbol
;
43 symbolS
*dot_data_symbol
;
44 symbolS
*dot_bss_symbol
;
48 static void fb_label_init
PARAMS ((void));
54 symbol_rootP
= NULL
; /* In case we have 0 symbols (!!) */
55 sy_hash
= hash_new ();
56 memset ((char *) (&abs_symbol
), '\0', sizeof (abs_symbol
));
58 abs_symbol
.bsym
= bfd_abs_section
.symbol
;
60 /* Can't initialise a union. Sigh. */
61 S_SET_SEGMENT (&abs_symbol
, absolute_section
);
63 #ifdef LOCAL_LABELS_FB
65 #endif /* LOCAL_LABELS_FB */
71 * Return a pointer to a new symbol.
72 * Die if we can't make a new symbol.
73 * Fill in the symbol's values.
74 * Add symbol to end of symbol chain.
77 * Please always call this to create a new symbol.
79 * Changes since 1985: Symbol names may not contain '\0'. Sigh.
80 * 2nd argument is now a SEG rather than a TYPE. The mapping between
81 * segments and types is mostly encapsulated herein (actually, we inherit it
82 * from macros in struc-symbol.h).
86 symbol_new (name
, segment
, value
, frag
)
87 CONST
char *name
; /* It is copied, the caller can destroy/modify */
88 segT segment
; /* Segment identifier (SEG_<something>) */
89 valueT value
; /* Symbol value */
90 fragS
*frag
; /* Associated fragment */
92 unsigned int name_length
;
93 char *preserved_copy_of_name
;
96 name_length
= strlen (name
) + 1; /* +1 for \0 */
97 obstack_grow (¬es
, name
, name_length
);
98 preserved_copy_of_name
= obstack_finish (¬es
);
99 #ifdef STRIP_UNDERSCORE
100 if (preserved_copy_of_name
[0] == '_')
101 preserved_copy_of_name
++;
103 symbolP
= (symbolS
*) obstack_alloc (¬es
, sizeof (symbolS
));
105 /* symbol must be born in some fixed state. This seems as good as any. */
106 memset (symbolP
, 0, sizeof (symbolS
));
110 symbolP
->bsym
= bfd_make_empty_symbol (stdoutput
);
111 assert (symbolP
->bsym
!= 0);
112 symbolP
->bsym
->udata
= (PTR
) symbolP
;
114 S_SET_NAME (symbolP
, preserved_copy_of_name
);
116 S_SET_SEGMENT (symbolP
, segment
);
117 S_SET_VALUE (symbolP
, value
);
118 symbol_clear_list_pointers(symbolP
);
120 symbolP
->sy_frag
= frag
;
121 #ifndef BFD_ASSEMBLER
122 symbolP
->sy_number
= ~0;
123 symbolP
->sy_name_offset
= ~0;
127 * Link to end of symbol chain.
129 symbol_append (symbolP
, symbol_lastP
, &symbol_rootP
, &symbol_lastP
);
131 obj_symbol_new_hook (symbolP
);
134 verify_symbol_chain(symbol_rootP
, symbol_lastP
);
144 * We have just seen "<name>:".
145 * Creates a struct symbol unless it already exists.
147 * Gripes if we are redefining a symbol incompatibly (and ignores it).
151 colon (sym_name
) /* just seen "x:" - rattle symbols & frags */
152 register char *sym_name
; /* symbol name, as a cannonical string */
153 /* We copy this string: OK to alter later. */
155 register symbolS
*symbolP
; /* symbol we are working with */
157 #ifdef LOCAL_LABELS_DOLLAR
158 /* Sun local labels go out of scope whenever a non-local symbol is
161 if (*sym_name
!= 'L')
162 dollar_label_clear ();
163 #endif /* LOCAL_LABELS_DOLLAR */
165 #ifndef WORKING_DOT_WORD
166 if (new_broken_words
)
168 struct broken_word
*a
;
173 extern const int md_short_jump_size
;
174 extern const int md_long_jump_size
;
175 possible_bytes
= (md_short_jump_size
176 + new_broken_words
* md_long_jump_size
);
179 frag_opcode
= frag_var (rs_broken_word
,
183 (symbolS
*) broken_words
,
187 /* We want to store the pointer to where to insert the jump table in the
188 fr_opcode of the rs_broken_word frag. This requires a little
191 && (frag_tmp
->fr_type
!= rs_broken_word
192 || frag_tmp
->fr_opcode
))
193 frag_tmp
= frag_tmp
->fr_next
;
195 frag_tmp
->fr_opcode
= frag_opcode
;
196 new_broken_words
= 0;
198 for (a
= broken_words
; a
&& a
->dispfrag
== 0; a
= a
->next_broken_word
)
199 a
->dispfrag
= frag_tmp
;
201 #endif /* WORKING_DOT_WORD */
203 if ((symbolP
= symbol_find (sym_name
)) != 0)
205 #ifdef RESOLVE_SYMBOL_REDEFINITION
206 if (RESOLVE_SYMBOL_REDEFINITION (symbolP
))
210 * Now check for undefined symbols
212 if (!S_IS_DEFINED (symbolP
))
214 if (S_GET_VALUE (symbolP
) == 0)
216 symbolP
->sy_frag
= frag_now
;
218 S_GET_OTHER(symbolP
) = const_flag
;
220 S_SET_VALUE (symbolP
, (valueT
) ((char*)obstack_next_free (&frags
) - frag_now
->fr_literal
));
221 S_SET_SEGMENT (symbolP
, now_seg
);
224 #endif /* if we have one, it better be zero. */
230 * There are still several cases to check:
231 * A .comm/.lcomm symbol being redefined as
232 * initialized data is OK
233 * A .comm/.lcomm symbol being redefined with
234 * a larger size is also OK
236 * This only used to be allowed on VMS gas, but Sun cc
237 * on the sparc also depends on it.
240 if (((!S_IS_DEBUG (symbolP
)
241 && !S_IS_DEFINED (symbolP
)
242 && S_IS_EXTERNAL (symbolP
))
243 || S_GET_SEGMENT (symbolP
) == bss_section
)
244 && (now_seg
== data_section
245 || now_seg
== S_GET_SEGMENT (symbolP
)))
248 * Select which of the 2 cases this is
250 if (now_seg
!= data_section
)
253 * New .comm for prev .comm symbol.
254 * If the new size is larger we just
255 * change its value. If the new size
256 * is smaller, we ignore this symbol
258 if (S_GET_VALUE (symbolP
)
259 < ((unsigned) frag_now_fix ()))
261 S_SET_VALUE (symbolP
, (valueT
) frag_now_fix ());
266 /* It is a .comm/.lcomm being converted to initialized
268 symbolP
->sy_frag
= frag_now
;
270 S_GET_OTHER(symbolP
) = const_flag
;
272 S_SET_VALUE (symbolP
, (valueT
) frag_now_fix ());
273 S_SET_SEGMENT (symbolP
, now_seg
); /* keep N_EXT bit */
278 #if defined (S_GET_OTHER) && defined (S_GET_DESC)
279 as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%d.%d.%ld.",
281 segment_name (S_GET_SEGMENT (symbolP
)),
282 S_GET_OTHER (symbolP
), S_GET_DESC (symbolP
),
283 (long) S_GET_VALUE (symbolP
));
285 as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%d.",
287 segment_name (S_GET_SEGMENT (symbolP
)),
288 S_GET_VALUE (symbolP
));
291 } /* if the undefined symbol has no value */
295 /* Don't blow up if the definition is the same */
296 if (!(frag_now
== symbolP
->sy_frag
297 && S_GET_VALUE (symbolP
) == (char*)obstack_next_free (&frags
) - frag_now
->fr_literal
298 && S_GET_SEGMENT (symbolP
) == now_seg
))
299 as_fatal ("Symbol %s already defined.", sym_name
);
300 } /* if this symbol is not yet defined */
305 symbolP
= symbol_new (sym_name
,
307 (valueT
) ((char*)obstack_next_free (&frags
) - frag_now
->fr_literal
),
310 S_SET_OTHER (symbolP
, const_flag
);
313 symbol_table_insert (symbolP
);
314 } /* if we have seen this symbol before */
317 tc_frob_label (symbolP
);
325 * symbol_table_insert()
327 * Die if we can't insert the symbol.
332 symbol_table_insert (symbolP
)
335 register char *error_string
;
338 know (S_GET_NAME (symbolP
));
340 if (*(error_string
= hash_jam (sy_hash
, S_GET_NAME (symbolP
), (char *) symbolP
)))
342 as_fatal ("Inserting \"%s\" into symbol table failed: %s",
343 S_GET_NAME (symbolP
), error_string
);
345 } /* symbol_table_insert() */
348 * symbol_find_or_make()
350 * If a symbol name does not exist, create it as undefined, and insert
351 * it into the symbol table. Return a pointer to it.
354 symbol_find_or_make (name
)
357 register symbolS
*symbolP
;
359 symbolP
= symbol_find (name
);
363 symbolP
= symbol_make (name
);
365 symbol_table_insert (symbolP
);
366 } /* if symbol wasn't found */
369 } /* symbol_find_or_make() */
377 /* Let the machine description default it, e.g. for register names. */
378 symbolP
= md_undefined_symbol ((char *) name
);
381 symbolP
= symbol_new (name
, undefined_section
, (valueT
) 0, &zero_address_frag
);
384 } /* symbol_make() */
389 * Implement symbol table lookup.
390 * In: A symbol's name as a string: '\0' can't be part of a symbol name.
391 * Out: NULL if the name was not in the symbol table, else the address
392 * of a struct symbol associated with that name.
399 #ifdef STRIP_UNDERSCORE
400 return (symbol_find_base (name
, 1));
401 #else /* STRIP_UNDERSCORE */
402 return (symbol_find_base (name
, 0));
403 #endif /* STRIP_UNDERSCORE */
404 } /* symbol_find() */
407 symbol_find_base (name
, strip_underscore
)
409 int strip_underscore
;
411 if (strip_underscore
&& *name
== '_')
413 return ((symbolS
*) hash_find (sy_hash
, name
));
417 * Once upon a time, symbols were kept in a singly linked list. At
418 * least coff needs to be able to rearrange them from time to time, for
419 * which a doubly linked list is much more convenient. Loic did these
420 * as macros which seemed dangerous to me so they're now functions.
424 /* Link symbol ADDME after symbol TARGET in the chain. */
426 symbol_append (addme
, target
, rootPP
, lastPP
)
434 know (*rootPP
== NULL
);
435 know (*lastPP
== NULL
);
439 } /* if the list is empty */
441 if (target
->sy_next
!= NULL
)
443 #ifdef SYMBOLS_NEED_BACKPOINTERS
444 target
->sy_next
->sy_previous
= addme
;
445 #endif /* SYMBOLS_NEED_BACKPOINTERS */
449 know (*lastPP
== target
);
451 } /* if we have a next */
453 addme
->sy_next
= target
->sy_next
;
454 target
->sy_next
= addme
;
456 #ifdef SYMBOLS_NEED_BACKPOINTERS
457 addme
->sy_previous
= target
;
458 #endif /* SYMBOLS_NEED_BACKPOINTERS */
461 #ifdef SYMBOLS_NEED_BACKPOINTERS
462 /* Remove SYMBOLP from the list. */
464 symbol_remove (symbolP
, rootPP
, lastPP
)
469 if (symbolP
== *rootPP
)
471 *rootPP
= symbolP
->sy_next
;
472 } /* if it was the root */
474 if (symbolP
== *lastPP
)
476 *lastPP
= symbolP
->sy_previous
;
477 } /* if it was the tail */
479 if (symbolP
->sy_next
!= NULL
)
481 symbolP
->sy_next
->sy_previous
= symbolP
->sy_previous
;
484 if (symbolP
->sy_previous
!= NULL
)
486 symbolP
->sy_previous
->sy_next
= symbolP
->sy_next
;
490 verify_symbol_chain (*rootPP
, *lastPP
);
494 /* Set the chain pointers of SYMBOL to null. */
496 symbol_clear_list_pointers (symbolP
)
499 symbolP
->sy_next
= NULL
;
500 symbolP
->sy_previous
= NULL
;
503 /* Link symbol ADDME before symbol TARGET in the chain. */
505 symbol_insert (addme
, target
, rootPP
, lastPP
)
511 if (target
->sy_previous
!= NULL
)
513 target
->sy_previous
->sy_next
= addme
;
517 know (*rootPP
== target
);
521 addme
->sy_previous
= target
->sy_previous
;
522 target
->sy_previous
= addme
;
523 addme
->sy_next
= target
;
526 verify_symbol_chain (*rootPP
, *lastPP
);
530 #endif /* SYMBOLS_NEED_BACKPOINTERS */
533 verify_symbol_chain (rootP
, lastP
)
537 symbolS
*symbolP
= rootP
;
542 for (; symbol_next (symbolP
) != NULL
; symbolP
= symbol_next (symbolP
))
544 #ifdef SYMBOLS_NEED_BACKPOINTERS
545 know (symbolP
->sy_next
->sy_previous
== symbolP
);
547 /* Walk the list anyways, to make sure pointers are still good. */
549 #endif /* SYMBOLS_NEED_BACKPOINTERS */
552 assert (lastP
== symbolP
);
556 verify_symbol_chain_2 (sym
)
559 symbolS
*p
= sym
, *n
= sym
;
560 #ifdef SYMBOLS_NEED_BACKPOINTERS
561 while (symbol_previous (p
))
562 p
= symbol_previous (p
);
564 while (symbol_next (n
))
566 verify_symbol_chain (p
, n
);
569 /* Resolve the value of a symbol. This is called during the final
570 pass over the symbol table to resolve any symbols with complex
574 resolve_symbol_value (symp
)
577 if (symp
->sy_resolved
)
580 if (symp
->sy_resolving
)
582 as_bad ("Symbol definition loop encountered at %s",
584 S_SET_VALUE (symp
, (valueT
) 0);
588 symp
->sy_resolving
= 1;
590 if (symp
->sy_value
.X_seg
== absolute_section
)
591 S_SET_VALUE (symp
, S_GET_VALUE (symp
) + symp
->sy_frag
->fr_address
);
592 else if (symp
->sy_value
.X_seg
== undefined_section
)
594 resolve_symbol_value (symp
->sy_value
.X_add_symbol
);
596 #ifdef obj_frob_forward_symbol
597 /* Some object formats need to forward the segment. */
598 obj_frob_forward_symbol (symp
);
602 (symp
->sy_value
.X_add_number
603 + symp
->sy_frag
->fr_address
604 + S_GET_VALUE (symp
->sy_value
.X_add_symbol
)));
606 else if (symp
->sy_value
.X_seg
== diff_section
)
608 resolve_symbol_value (symp
->sy_value
.X_add_symbol
);
609 resolve_symbol_value (symp
->sy_value
.X_subtract_symbol
);
610 if (S_GET_SEGMENT (symp
->sy_value
.X_add_symbol
)
611 != S_GET_SEGMENT (symp
->sy_value
.X_subtract_symbol
))
612 as_bad ("%s is difference of symbols in different sections",
615 (symp
->sy_value
.X_add_number
616 + symp
->sy_frag
->fr_address
617 + S_GET_VALUE (symp
->sy_value
.X_add_symbol
)
618 - S_GET_VALUE (symp
->sy_value
.X_subtract_symbol
)));
619 S_SET_SEGMENT (symp
, absolute_section
);
623 /* More cases need to be added here. */
628 symp
->sy_resolved
= 1;
631 #ifdef LOCAL_LABELS_DOLLAR
633 /* Dollar labels look like a number followed by a dollar sign. Eg, "42$".
634 They are *really* local. That is, they go out of scope whenever we see a
635 label that isn't local. Also, like fb labels, there can be multiple
636 instances of a dollar label. Therefor, we name encode each instance with
637 the instance number, keep a list of defined symbols separate from the real
638 symbol table, and we treat these buggers as a sparse array. */
640 static long *dollar_labels
;
641 static long *dollar_label_instances
;
642 static char *dollar_label_defines
;
643 static long dollar_label_count
;
644 static long dollar_label_max
;
647 dollar_label_defined (label
)
652 know ((dollar_labels
!= NULL
) || (dollar_label_count
== 0));
654 for (i
= dollar_labels
; i
< dollar_labels
+ dollar_label_count
; ++i
)
656 return dollar_label_defines
[i
- dollar_labels
];
658 /* if we get here, label isn't defined */
660 } /* dollar_label_defined() */
663 dollar_label_instance (label
)
668 know ((dollar_labels
!= NULL
) || (dollar_label_count
== 0));
670 for (i
= dollar_labels
; i
< dollar_labels
+ dollar_label_count
; ++i
)
672 return (dollar_label_instances
[i
- dollar_labels
]);
674 /* If we get here, we haven't seen the label before, therefore its instance
680 dollar_label_clear ()
682 memset (dollar_label_defines
, '\0', dollar_label_count
);
685 #define DOLLAR_LABEL_BUMP_BY 10
688 define_dollar_label (label
)
693 for (i
= dollar_labels
; i
< dollar_labels
+ dollar_label_count
; ++i
)
696 ++dollar_label_instances
[i
- dollar_labels
];
697 dollar_label_defines
[i
- dollar_labels
] = 1;
701 /* if we get to here, we don't have label listed yet. */
703 if (dollar_labels
== NULL
)
705 dollar_labels
= (long *) xmalloc (DOLLAR_LABEL_BUMP_BY
* sizeof (long));
706 dollar_label_instances
= (long *) xmalloc (DOLLAR_LABEL_BUMP_BY
* sizeof (long));
707 dollar_label_defines
= xmalloc (DOLLAR_LABEL_BUMP_BY
);
708 dollar_label_max
= DOLLAR_LABEL_BUMP_BY
;
709 dollar_label_count
= 0;
711 else if (dollar_label_count
== dollar_label_max
)
713 dollar_label_max
+= DOLLAR_LABEL_BUMP_BY
;
714 dollar_labels
= (long *) xrealloc ((char *) dollar_labels
,
715 dollar_label_max
* sizeof (long));
716 dollar_label_instances
= (long *) xrealloc ((char *) dollar_label_instances
,
717 dollar_label_max
* sizeof (long));
718 dollar_label_defines
= xrealloc (dollar_label_defines
, dollar_label_max
);
719 } /* if we needed to grow */
721 dollar_labels
[dollar_label_count
] = label
;
722 dollar_label_instances
[dollar_label_count
] = 1;
723 dollar_label_defines
[dollar_label_count
] = 1;
724 ++dollar_label_count
;
728 * dollar_label_name()
730 * Caller must copy returned name: we re-use the area for the next name.
732 * The mth occurence of label n: is turned into the symbol "Ln^Am"
733 * where n is the label number and m is the instance number. "L" makes
734 * it a label discarded unless debugging and "^A"('\1') ensures no
735 * ordinary symbol SHOULD get the same name as a local label
736 * symbol. The first "4:" is "L4^A1" - the m numbers begin at 1.
738 * fb labels get the same treatment, except that ^B is used in place of ^A.
741 char * /* Return local label name. */
742 dollar_label_name (n
, augend
)
743 register long n
; /* we just saw "n$:" : n a number */
744 register int augend
; /* 0 for current instance, 1 for new instance */
747 /* Returned to caller, then copied. used for created names ("4f") */
748 static char symbol_name_build
[24];
751 char symbol_name_temporary
[20]; /* build up a number, BACKWARDS */
754 know (augend
== 0 || augend
== 1);
755 p
= symbol_name_build
;
758 /* Next code just does sprintf( {}, "%d", n); */
760 q
= symbol_name_temporary
;
761 for (*q
++ = 0, i
= n
; i
; ++q
)
766 while ((*p
= *--q
) != '\0')
771 /* instance number */
772 q
= symbol_name_temporary
;
773 for (*q
++ = 0, i
= dollar_label_instance (n
) + augend
; i
; ++q
)
778 while ((*p
++ = *--q
) != '\0');;
780 /* The label, as a '\0' ended string, starts at symbol_name_build. */
781 return symbol_name_build
;
784 #endif /* LOCAL_LABELS_DOLLAR */
786 #ifdef LOCAL_LABELS_FB
789 * Sombody else's idea of local labels. They are made by "n:" where n
790 * is any decimal digit. Refer to them with
791 * "nb" for previous (backward) n:
792 * or "nf" for next (forward) n:.
794 * We do a little better and let n be any number, not just a single digit, but
795 * since the other guy's assembler only does ten, we treat the first ten
798 * Like someone else's assembler, we have one set of local label counters for
799 * entire assembly, not one set per (sub)segment like in most assemblers. This
800 * implies that one can refer to a label in another segment, and indeed some
801 * crufty compilers have done just that.
803 * Since there could be a LOT of these things, treat them as a sparse array.
806 #define FB_LABEL_SPECIAL (10)
808 static long fb_low_counter
[FB_LABEL_SPECIAL
];
809 static long *fb_labels
;
810 static long *fb_label_instances
;
811 static long fb_label_count
= 0;
812 static long fb_label_max
= 0;
814 /* this must be more than FB_LABEL_SPECIAL */
815 #define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6)
820 memset ((void *) fb_low_counter
, '\0', sizeof (fb_low_counter
));
821 } /* fb_label_init() */
823 /* add one to the instance number of this fb label */
825 fb_label_instance_inc (label
)
830 if (label
< FB_LABEL_SPECIAL
)
832 ++fb_low_counter
[label
];
836 if (fb_labels
!= NULL
)
838 for (i
= fb_labels
+ FB_LABEL_SPECIAL
;
839 i
< fb_labels
+ fb_label_count
; ++i
)
843 ++fb_label_instances
[i
- fb_labels
];
845 } /* if we find it */
846 } /* for each existing label */
849 /* if we get to here, we don't have label listed yet. */
851 if (fb_labels
== NULL
)
853 fb_labels
= (long *) xmalloc (FB_LABEL_BUMP_BY
* sizeof (long));
854 fb_label_instances
= (long *) xmalloc (FB_LABEL_BUMP_BY
* sizeof (long));
855 fb_label_max
= FB_LABEL_BUMP_BY
;
856 fb_label_count
= FB_LABEL_SPECIAL
;
859 else if (fb_label_count
== fb_label_max
)
861 fb_label_max
+= FB_LABEL_BUMP_BY
;
862 fb_labels
= (long *) xrealloc ((char *) fb_labels
,
863 fb_label_max
* sizeof (long));
864 fb_label_instances
= (long *) xrealloc ((char *) fb_label_instances
,
865 fb_label_max
* sizeof (long));
866 } /* if we needed to grow */
868 fb_labels
[fb_label_count
] = label
;
869 fb_label_instances
[fb_label_count
] = 1;
872 } /* fb_label_instance_inc() */
875 fb_label_instance (label
)
880 if (label
< FB_LABEL_SPECIAL
)
882 return (fb_low_counter
[label
]);
885 if (fb_labels
!= NULL
)
887 for (i
= fb_labels
+ FB_LABEL_SPECIAL
;
888 i
< fb_labels
+ fb_label_count
; ++i
)
892 return (fb_label_instances
[i
- fb_labels
]);
893 } /* if we find it */
894 } /* for each existing label */
897 /* We didn't find the label, so this must be a reference to the
905 * Caller must copy returned name: we re-use the area for the next name.
907 * The mth occurence of label n: is turned into the symbol "Ln^Bm"
908 * where n is the label number and m is the instance number. "L" makes
909 * it a label discarded unless debugging and "^B"('\2') ensures no
910 * ordinary symbol SHOULD get the same name as a local label
911 * symbol. The first "4:" is "L4^B1" - the m numbers begin at 1.
913 * dollar labels get the same treatment, except that ^A is used in place of ^B. */
915 char * /* Return local label name. */
916 fb_label_name (n
, augend
)
917 long n
; /* we just saw "n:", "nf" or "nb" : n a number */
918 long augend
; /* 0 for nb, 1 for n:, nf */
921 /* Returned to caller, then copied. used for created names ("4f") */
922 static char symbol_name_build
[24];
925 char symbol_name_temporary
[20]; /* build up a number, BACKWARDS */
928 know (augend
== 0 || augend
== 1);
929 p
= symbol_name_build
;
932 /* Next code just does sprintf( {}, "%d", n); */
934 q
= symbol_name_temporary
;
935 for (*q
++ = 0, i
= n
; i
; ++q
)
940 while ((*p
= *--q
) != '\0')
945 /* instance number */
946 q
= symbol_name_temporary
;
947 for (*q
++ = 0, i
= fb_label_instance (n
) + augend
; i
; ++q
)
952 while ((*p
++ = *--q
) != '\0');;
954 /* The label, as a '\0' ended string, starts at symbol_name_build. */
955 return (symbol_name_build
);
956 } /* fb_label_name() */
958 #endif /* LOCAL_LABELS_FB */
962 * decode name that may have been generated by foo_label_name() above. If
963 * the name wasn't generated by foo_label_name(), then return it unaltered.
964 * This is used for error messages.
968 decode_local_label_name (s
)
976 const char *message_format
= "\"%d\" (instance number %d of a %s label)";
981 for (label_number
= 0, p
= s
+ 1; isdigit (*p
); ++p
)
983 label_number
= (10 * label_number
) + *p
- '0';
999 for (instance_number
= 0, p
= s
+ 1; isdigit (*p
); ++p
)
1001 instance_number
= (10 * instance_number
) + *p
- '0';
1004 symbol_decode
= obstack_alloc (¬es
, strlen (message_format
) + 30);
1005 (void) sprintf (symbol_decode
, message_format
, label_number
,
1006 instance_number
, type
);
1008 return (symbol_decode
);
1009 } /* decode_local_label_name() */
1011 /* Get the value of a symbol. */
1017 if (s
->sy_value
.X_seg
!= absolute_section
)
1018 as_bad ("Attempt to get value of unresolved symbol %s", S_GET_NAME (s
));
1019 return (valueT
) s
->sy_value
.X_add_number
;
1022 /* Set the value of a symbol. */
1025 S_SET_VALUE (s
, val
)
1029 s
->sy_value
.X_seg
= absolute_section
;
1030 s
->sy_value
.X_add_number
= (offsetT
) val
;
1033 #ifdef BFD_ASSEMBLER
1039 flagword flags
= s
->bsym
->flags
;
1042 if (flags
& BSF_LOCAL
&& flags
& (BSF_EXPORT
| BSF_GLOBAL
))
1045 return (flags
& (BSF_EXPORT
| BSF_GLOBAL
)) != 0;
1052 return s
->bsym
->section
== &bfd_com_section
;
1059 return s
->bsym
->section
!= undefined_section
;
1066 if (s
->bsym
->flags
& BSF_DEBUGGING
)
1075 flagword flags
= s
->bsym
->flags
;
1078 if (flags
& BSF_LOCAL
&& flags
& (BSF_EXPORT
| BSF_GLOBAL
))
1081 return (S_GET_NAME (s
)
1083 && (strchr (S_GET_NAME (s
), '\001')
1084 || strchr (S_GET_NAME (s
), '\002')
1085 || (S_LOCAL_NAME (s
)
1086 && !flagseen
['L'])));
1093 return S_IS_EXTERNAL (s
);
1100 return S_GET_NAME (s
) == 0;
1107 return s
->bsym
->name
;
1114 return s
->bsym
->section
;
1118 S_SET_SEGMENT (s
, seg
)
1122 s
->bsym
->section
= seg
;
1129 s
->bsym
->flags
|= BSF_EXPORT
| BSF_GLOBAL
;
1130 s
->bsym
->flags
&= ~BSF_LOCAL
;
1134 S_CLEAR_EXTERNAL (s
)
1137 s
->bsym
->flags
|= BSF_LOCAL
;
1138 s
->bsym
->flags
&= ~(BSF_EXPORT
| BSF_GLOBAL
);
1142 S_SET_NAME (s
, name
)
1146 s
->bsym
->name
= name
;
1148 #endif /* BFD_ASSEMBLER */
1150 /* end of symbols.c */
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